776229778989 has 36 divisors (see below), whose sum is σ = 1304742011040. Its totient is φ = 443401817040.

The previous prime is 776229778979. The next prime is 776229778997. The reversal of 776229778989 is 989877922677.

It is not a de Polignac number, because 776229778989 - 2⁵ = 776229778957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776229778949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 930984 + ... + 1555374.

It is an arithmetic number, because the mean of its divisors is an integer number (36242833640).

Almost surely, 2^776229778989 is an apocalyptic number.

It is an amenable number.

776229778989 is a deficient number, since it is larger than the sum of its proper divisors (528512232051).

776229778989 is a wasteful number, since it uses less digits than its factorization.

776229778989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627230 (or 627220 counting only the distinct ones).

The product of its digits is 2688505344, while the sum is 81.

The spelling of 776229778989 in words is "seven hundred seventy-six billion, two hundred twenty-nine million, seven hundred seventy-eight thousand, nine hundred eighty-nine".